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What is the benefit of myelination of an axon?

Myelination of an axon makes propagation of action potentials along it much faster. In unmyelinated axons, the action potential is constantly regenerated by active propagation, with the depolarisation causin...
YM
Answered by Yunzila M. • Biology tutor
3696 Views

Explain three ways in which the structure of the xylem vessels makes them well-adapted to their function.

The end walls are removed from each end, forming an uninterrupted tube, so water can pass through easily.Their walls are thickened with a woody substance called lignin , which helps to support the xylem vess...
HW
Answered by Hannah W. • Biology tutor
59011 Views

Describe the generation of action potentials in neurons.

When the neuron is stimulated, it causes rapid depolarisation of the cell surface membrane. This will not generate an action potential unless it is large enough to exceed the threshold potential . If it does...
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Answered by Howard R. • Biology tutor
6185 Views

Why is water being a solvent important?

dilute harmful substancestransport in bloodstream and plantsfor metabolic reactions to occurseparation of substancesabsorption of ions etc.
SA
3218 Views

What is the definition of a pathogen and give two examples. (3 marks)

An organism that can cause disease - e.g. virus, bacterium, fungus
TR
Answered by Thomas R. • Biology tutor
3826 Views